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    VWVortex


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    Thread: How To : check for valve leakage with head off

    1. Member Slimjimmn's Avatar
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      02 GTI 1.8t
      05-01-2012 08:46 PM #1
      So people ask, how the heck do you check to see if the valves are sealing with a head off a car.
      With the head IN the car, you can just do a cyl leak down test. But what do you do to check if the head is off the car.

      Water test!


      If the water stays the same overnight in all the cylinders, its good to go. No bent valves yay!
      the car is on an inclined driveway and up on jack stands in the front only
      02 GTI 1.8t:> 42DD 3" turboback, BFI full stg1 mount kit, Evoms CAI, Forge boost hoses, Tacotaco sidemount, Ebay TIP, IE 2.0 coil conversion, IE manual tensioner, 20th front brake conversion, IE emissions delete, 42dd catch can, Koni STR.t & WRD sport springs, Samco Coolant hoses, SMF vr6 clutch kit.

    2. 05-07-2012 09:28 PM #2
      Gas is a better choice.
      Up and Atom!

    3. Member Slimjimmn's Avatar
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      02 GTI 1.8t
      05-07-2012 09:54 PM #3
      yea, but it smells, and evaporates overnight.
      the car is on an inclined driveway and up on jack stands in the front only
      02 GTI 1.8t:> 42DD 3" turboback, BFI full stg1 mount kit, Evoms CAI, Forge boost hoses, Tacotaco sidemount, Ebay TIP, IE 2.0 coil conversion, IE manual tensioner, 20th front brake conversion, IE emissions delete, 42dd catch can, Koni STR.t & WRD sport springs, Samco Coolant hoses, SMF vr6 clutch kit.

    4. Member Jesse-B's Avatar
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      1984 Vw Rabbit, 2004 Passat W8 wagon.
      05-09-2012 03:34 PM #4
      Yea,but with gas you find out immediately!

    5. Moderator root beer's Avatar
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      96 Golf 83 Scirocco
      05-12-2012 08:14 AM #5
      Tried on a vr head, didn't work.

      Teehee
      How to build a relatively inexpensive, reliable, powerful VR6
      I am ready, I am

      I want to buy some 4x100 15" Pininfarinas. If you have one of the few sets i've seen, please let me know.

    6. Member Slimjimmn's Avatar
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      02 GTI 1.8t
      05-12-2012 10:39 PM #6
      then either the valves have carbon buildup or something else is wrong.
      the car is on an inclined driveway and up on jack stands in the front only
      02 GTI 1.8t:> 42DD 3" turboback, BFI full stg1 mount kit, Evoms CAI, Forge boost hoses, Tacotaco sidemount, Ebay TIP, IE 2.0 coil conversion, IE manual tensioner, 20th front brake conversion, IE emissions delete, 42dd catch can, Koni STR.t & WRD sport springs, Samco Coolant hoses, SMF vr6 clutch kit.

    7. 08-29-2012 07:08 PM #7
      can you tell me where should i exactly pour the water, on the head ???

    8. 08-29-2012 07:11 PM #8
      i wanna make sure if my valves are not bent.before when i did compression test i was getting 3.0 3.5 psi on every almost cylinder.???
      and could you advice me

    9. Geriatric Member need_a_VR6's Avatar
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      03 325i
      08-29-2012 10:56 PM #9
      Its good to check if something is way off but it won't catch small issues. Bent valve, sure. Bad valve job, nope. A fresh race valve job wont pass this test either so... like many things its one of a few tests you can do to figure out the whole story.
      -Paul
      1995 GTI VR6 - ??.??@??? 3.6 Power - 12.90@106 R32 power - 12.833@106 12v power
      KPTuned - Official MegaSquirt: Sales - Repair - Installation - Tuning
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    10. Member lil8v's Avatar
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      03 20th ann..retired 97 gti that was a lil bit of everything
      10-20-2012 09:26 PM #10
      water is retarted and a good way to start rust on a valve seat...to check with head off a car you need a very thin liquid such as lacquer thinner but yes as paul said sometimes with a race valve job regardless the valves will leak but seal once running....
      2003 mk4 20th anniversary 10.30 at 151
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    11. Member Slimjimmn's Avatar
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      02 GTI 1.8t
      10-20-2012 10:19 PM #11
      Worked on every head I tried.
      the car is on an inclined driveway and up on jack stands in the front only
      02 GTI 1.8t:> 42DD 3" turboback, BFI full stg1 mount kit, Evoms CAI, Forge boost hoses, Tacotaco sidemount, Ebay TIP, IE 2.0 coil conversion, IE manual tensioner, 20th front brake conversion, IE emissions delete, 42dd catch can, Koni STR.t & WRD sport springs, Samco Coolant hoses, SMF vr6 clutch kit.

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